Agilent Technologies DSO80204B, Service Manual

Page: 54 / 161

Chapter 4: Testing Performance
DC Gain Accuracy Test
53
15
Calculate the offset gain using the following expression and record this value in the
DC Gain Test section of the Performance Test Record.
For vertical sensitivities of less than 1 volt use the following equation:
For vertical sensitivity = 1 V use the following equation:
DCGainError =
∆
V
out
∆
V
in
-------------- =
V
scope +
– V
scope -
V
DMM +
– V
DMM -
----------------------------------------- 1 –
⎝ ⎠
⎛ ⎞
75
⋅
⎝
⎛
DCGainError =
∆
V
out
∆
V
in
-------------- =
V
scope +
– V
scope -
V
DMM +
– V
DMM -
----------------------------------------- 1 –
⎠
⎞
60
⋅
⎝
⎛